Lowering level of the ground up to the neighbours wall (wall foundations)

[UKG]

Hi all

Thanks for reading.

I'm in the process of planning a double garage build - 7m x 7m.

It will involve lowering the ground at the bottom of my garden by about 3 feet (at its highest). The bottom of the garden runs parallel to the neighbours wall and foundations (which must run onto my land).

On the opposite side is a fence.

The 7m x 7m foundations will not be leaving much room either side.

Can anyone advise on what will happen if I dig up to the neighbours wall foundations - will the wall fall down? Can I leave the foundations showing? Is there a way to retain it that wont take up too much space ? ( I need to leave a run way down the side of the garage!

Any advice would be hugely appreciated.

The plan is attached.

 

[Newboy]

The neighbours wall may not fall down but it is likely to become unstable. No you can't leave the foundations exposed.

The obvious question - how deep are the foundations for the existing structure?

PS - no plan attached!

 

[^woody^]

Generally, the ground, and foundations will move sideways, so would need to be retained with a wall to the side and below

 

[UKG]

Thanks all, really helpful advice. I've decided to stay at least 800mm away from the wall. I'll only need to dig down 2 feet (along a short length of the wall (approx 5 - 6 feet) and will build a retainer wall on my side. The distance from teh wall will be between 800 (for a foot) and then extend away from the wall to 1.5 meters away.

Does this sound suitable. I really don't need to dig deep.

Thanks